Sawing-machine.



S. N. KRAWGHENKO,

\ SAWING MACHINE.

APPLICATION FILED JULY 28, 1009.

96113453; Patented June 14,1910.

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s. N. KRAWGHENKO.

SAWING MAGHINE. APPLICATION FILED JULY 25, 1009.

Patented June 14,1910.

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S. N. KRAWGHENKO.

SAWING MACHINE.

APPLIGATIONIILED JULY 28, 1909.

Patented June 14, 1910.

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SAMUEL N. KEAWCHENKO, 0F WILMINGTON, DELAWARE.

SAWING-MACHINE.

To all whom it may concern:

Be it known that I, SAMUEL N. KRAW- CHENKO, a citizen of the United States, residing at lVilmington, in the county of Newcastle and State of Delaware, have invented a certain new and useful Improvement in Sawing-Machines, of which the following is a specification.

My invention relates to a new and useful improvement in sawing machines, and is adapted for a variety of uses but designed especially for ship builders use.

In building ships, especially those known as scows and freighters, very large timbers are used and portions of these have to be cut away so as to form joints. At the present time to cut away these parts a cut is made in the timbers with a saw and this is then cut out with an ax, which takes a greatv deal of time and considerable labor, besides that piece which is taken out is wasted as it is in very small pieces. lVith my improved saw these difficulties are overcome, because it is fastened securely to the timber after it has been set in the correct position so that the saw will out along the line desired. The timber can then be cut the desired length and the whole piece taken out at one time, thereby having it in a condition to be used for other purposes.

The saw will be so constructed that it will be durable, yet light enough to be readily carried by two men from place to place.

Another object of the invention is to provide a saw having a motor attached which may be readily connected with an electric current for running the saw, thus saving a great deal of time and labor.

With these ends in view, this invention consists in the details of construction and combination of elements hereinafter set forth and then specifically designated by the claims.

In order that those skilled in the art to which this invention appertains may understand how to make and use the same, I will describe its construction in detail, referring by letter to the accompanying drawing forming a part of this specification, in which- Figure 1 is a side elevation of my improved sawing machine. Fig. 2, a plan view thereof showing it secured to a timber. Fig. 3, a side elevation of the device for disengaging the pinion from the rack. Fig. 4, an enlarged section at the line 00-02 of Fig.

Specification of Letters Patent.

Application filed July 28, 1909.

Patented June 14., 1910.

Serial No. 510,116.

1 looking in the direction of the arrows. Fig. 5, a plan view of the hanger. Fig. 6, an enlarged plan view of the adjustable bearing showing its relation to the bracket, said bracket belng shown in section. Fig. 7 an end view of the table and block showing a modified form of mounting. Fig. 8, a bottom plan view of a sawing table. Fig. 9, an enlarged view of a portion of one of the fastening members showing the adjusting member in section, and Fig. 10, an enlarged View of the gage or finder.

In carrying out my invention as here embodied, A represents a table having parallel ribbed portions B running lengthwise thereof, and provided at its ends with handles C whereby it may be readily moved from place to place. On this table is mounted a sliding block D having parallel slots E which register with the parallel ribbed portions B on the table; thus these ribbed portions act as a track for said block so that it will slide lengthwise of the table although in the same relative position. To this block is secured the hanger F, having arms G and H formed on its upper end and an arm I formed with its lower end, said arm I being directly beneath the arm H. With the vertical portion of said hanger is formed a flange J which is braced by a rod K at that portion where they are formed with one another. Between the vertical portion F and the flange is formed the chamber L, through which runs the saw to be hereinafter described. With the lower arm I is formed the bracket M, or if found desirable this may be secured thereto, and this bracket is dove-tailed as indicated by-N, and is provided at its lower end with a right angle extension 0.

P is a sliding bearing having dovetailed edges Q which are adapted to engage the dove-tailed edges of the bracket M, and to the lower end of this bearing is swiveled a screw R which is threaded through the extension 0 so that when said screw is turned the bearing will be raised or lowered. In this bearing is j ournaled a shaft S, on which is mounted a pulley T.

On the arms G and H of the hanger are mounted the brackets U, and on the block D is mounted another bracket V. In these brackets is journaled a shaft W, to which is secured an internal gear wheel Y, a pulley Z and a worm gear A. The pulley Z is mounted so that it is in alinement with the pulley T. Over these pulleys runs a band saw B.

Meshing with the internal gear Y is a pinion C mounted on the shaft of the motor D which is supplied with an electric current from some suitable source, passing through the wires E to the switch F, then through the wires G to the motor.

The worm gear A meshes with the gear H mounted on the shaft I which is journaled in the brackets J, and on this shaft is mounted a pinion K meshing with the gear L which is mounted on the shaft 0, and on this shaft is mounted the pinion P which meshes with the rack Q, secured to the upper surface of one edge of the table A. The shaft 0 passes through an eccentric disk M which is mounted in the bracket N and has secured thereto a lever R so that when the lever B is moved upward the eccentric disk I will be turned, thus raising the shaft 0 and disengaging the pinion P from the rack Q. To raise this lever I provide a stop S which is slidably secured to the rack Q and is adapted to be held by the screw T. This stop has an inclined surface U facing toward the lever B and when the lever comes in contact with said inclined surface it will gradually ride up the same until the pinion T has been disengaged from the rack Q, at which time the block will stop.

On each edge of the table are placed measuring devices V and W, the measuring device V being numbered from the saw, and the measuring device W being numbered from the lever B, so that when the stop S is placed in proximity to a number on the measuring device W the saw will run to the same number upon the measuring device V.

To one edge of the table A are secured the fastening members Y, each one of which is front to the rear of the device. These fastening devices are provided on their upper surfaces with the teeth Z, and on them slide the adjusting devices A consisting of the block of metal B having an opening 0 passing through the same, and through this opening passes the fastening member Y.

On the upper wall of the opening C are formed the teeth D adapted to engage the teeth Z. To the block of metal is pivoted the eccentric lever E which when drawn up will press the lower portion of the block away from the members Y, thus bringing the teeth into engagement for holding the adjusting member A in position.

On the underside of the table A are mounted the abutting members F having a right angle extension G formed therewith and provided with a slot H through which pass the screws I said screws being threaded into the table and by loosening these screws the members may be adjusted to any position and then held thereby by tightening said screws.

At one end of the table is mounted a permanent abutting member J WVhen the saw is to be used it is placed upon the timber K and moved along until the permanent member J 2 rests against the end of said timber, then the table is moved at right angles until the abutting members F come in con tact with the edge of the timber, then the edge of the table along which the saw runs will be on the line where the timber is to be cut, then by adjusting the adjustment members A until they rest against the opposite edge of the timber, the machine will be held securely to said timber, so that while in operation it will not move about which would cause a wrong out.

2 is a gage having a body portion M provided with slots N 2 running parallel with one another and adapted to fit upon the ribbed portions B upon the table. With one end of the body M is formed a depending rod 0 the end of which is bent at right angles, as indicated at P and in this is threaded a screw Q having a sharp point and when the body portion M is in position upon the table, the point of the screw will be in the same position as the saw, so that by running the gage along the table allow ing the screw to rest on the under side of the timber to be cut, it will at once show whether the machine is straight, for if the saw is in alinement with the line on the top of the timber and the screw allowed to run along the line underneath the timber, then the saw will make a straight out.

In practice the machine is placed upon the timber and then fastened thereto; then the motor is started which will cause the shaft W to revolve through the medium of the internal gear Y and the pinion C, and the pulley Z secured to said shaft will be revolved causing the saw B to operate, thus cutting the timber; at the same time the worm gear A and the intermediate gears will cause the pinion P to revolve, and as this meshes with the rack Q the block D will be caused to move along the table A. WVhen the block D has moved along until the lever B comes in contact with the stop S said lever will be raised, disengaging the pinion P from the rack Q, which will stop the movement of the block, then said block may be drawn back ready for the next operation.

In the modified form as shown in Fig. 7, I form grooves R in the table running parallel with one another, and this will raise the projections S formed with the lower surface of the block D. This of course will act the same as the ribbed portions B and the grooves E in my preferred form.

Of course I do not wish to be limited to the exact details of construction here shown, as these may be varied within the limits of the appended claims Without departing from the spirit of my invention.

Having thus fully described my invention what I claim as new and useful, is

1. In a sawing machine, a table having parallel ribbed portions formed therewith and provided with handles at both ends, a sliding block having grooves formed therein with which the ribbed portions are adapted to register, brackets secured to the block, a shaft journaled therein, means for revolving said shaft, a pulley mounted 011 said shaft, a hanger secured to the block having a pulley mounted on its lower end, a band saw passing over said pulleys, and means for causing said block to move along with the table.

2. In a sawing machine, a table having parallel ribbed portions, a block having grooves therein adapted to slide upon the table, a hanger having arms upon its upper end, another arm upon its lower end, a flange formed upon the vertical portion of said hanger, brackets mounted upon the block, a shaft journaled therein, an internal gear mounted on said shaft, a motor secured to the block, a pinion mounted on the shaft of said motor, engaging the internal gear, a pulley also mounted on said shaft, a bracket upon the lower arm of the hanger, a pulley secured to said bracket, a saw passing over the pulleys and between the flange and the body of the vertical portion of the hanger, and means for causing the block to travel along the table.

3. In a sawing machine, a table having parallel ribbed portions, a block having grooves therein adapted to slide upon the table, a hanger having arms upon its upper end, another arm upon its lower end, a flange formed upon the Vertical portion of said hanger, brackets mounted upon the block, a shaft j ournaled therein, an internal gear mounted on said shaft, a motor secured to the block, a pinion mounted on the shaft of said motor engaging the internal gear, a pulley also mounted on said shaft, a bracket upon the lower arm of the hanger, the edges of said bracket being dove-tailed, a sliding bearing dove-tailed to the bracket, means for adjusting said bearing, a shaft journaled in said bearing, a pulley mounted on said shaft, a band saw passing over the pulleys and between the body of the vertical portion of the hanger and the flange thereon, and means for causing the block to slide along the table.

at. In a sawing machine, a table having parallel ribbed portions, a block having grooves therein adapted to slide upon the table, a hanger having arms upon its upper end, another arm upon its lower end, a flange formed upon the vertical portion of said hanger, brackets mounted upon the block, a shaft journaled therein, an internal gear mounted on said shaft, a motor secured to the block, a pinion mounted on the shaft of said motor engaging the internal gear, a pulley also mounted on said shaft, a bracket upon the lower arm of the hanger, the edges of said bracket being dove-tailed, a sliding bearing dove-tailed to the bracket, means for adjusting said bearing, a shaft journaled in said bearing, a pulley mounted on said shaft, a band saw passing over the pulleys and between the body of the vertical portion of the hanger and the flange thereon, a rack secured to one edge of the table, brackets secured to the block, a shaft journaled in a number of said brackets, a pinion secured to said shaft adapted to engage the rack, a gear secured to said shaft, another shaft, a pin ion and a gear mounted thereon, a pinion meshing with the gear on the other shaft, and a worm gear mounted on the shaft on which the first named pulley is mounted meshing with the last named gear thereby causing the block to travel along the table.

5. In a sawing machine, a table having parallel ribbed portions, a block having grooves therein adapted to slide upon the table, a hanger having arms upon its upper end, another arm upon its lower end, a flange formed upon the vertical portion of said hanger, brackets mounted upon the block, a shaft journaled therein, an internal gear mounted on said shaft, a motor secured to the block, a pinion mounted on the shaft of said motor engaging the internal gear, a pulley also mounted on said shaft, a bracket upon the lower arm of the hanger, the edges of said bracket being dove-tailed, a sliding bearing dove-tailed to the bracket, means for adjusting said bearing, a shaft journaled in said bearing, a pulley mounted on said shaft, a band saw passing over the pulleys and between the body of the vertical portion of the hanger and the flange thereon, a rack secured to one edge of the table, brackets secured to the block, one of said brackets having an eccentric disk mounted therein, a lever formed with said eccentric disk, a shaft j ournaled in a number of said brackets pass ing through the eccentric disk,,a gear and a pinion mounted on said shaft, the pinion meshing with the rack, another shaft journaled in a number of said brackets, a pinion mounted thereon engaging the last named gear, another gear mounted on said shaft, a worm gear mounted on the shaft on which the pulley is mounted meshing with the last named gear, a stop slidably secured to the rack with which the lever is adapted to contact for disengaging the pinion from the rack, and means for securing the machine to the object to be cut.

6. In a sawing machine, a table having parallel ribbed portions, a block having grooves therein adapted to slide upon the table, a hanger having arms upon its upper end, another arm upon its lower end, a flange formed upon the vertical portion of said hanger, brackets mounted upon the block, a shaft journaled therein, an internal gear mounted on said shaft, a motor secured to the block, a pinion mounted on the shaft of said motor engagin the internal gear, a pulley also mounted on said shaft, a bracket upon the lower arm of the hanger, the edges of said bracket being dove-tailed, a sliding bearing dove-tailed to the bracket, means for adjusting said bearing, a shaft j ournaled in said bearing, a pulley mounted on said shaft, a band saw passing over the pulleys and between the body of the vertical portion of the hanger and the flange thereon, a rack secured to one edge of the table, brackets secured to the block, one of said brackets having an eccentric disk mounted therein, a lever formed with said eccentric disk, a shaft journaled in a number of said brackets passing through the eccentric disk, a gear and a pinion mounted on said shaft, the pinion meshingwith the rack, another shaft j ournaled in a number of said brackets, a pinion mounted thereon engaging the last named gear, another gear mounted on said shaft, a worm gear mounted on the shaft on which the pulley is mounted meshing with the last named gear, a stop slidably secured to the rack with which the lever is adapted to contact for disengaging the pinion from the rack, attaching members secured to the under side of the table, fastening members having teeth formed on their upper surfaces secured to the table, adjusting members mounted on said fastening members, and an eccentric lever mount-- ed in each of said adjusting members for tightening the same upon the fastening members.

7. In a sawing machine, a table having parallel ribbed portions, a block having grooves therein adapted to slide upon the table, a hanger having arms upon its upper end, another arm upon its lower end, a flange formed upon the vertical portion of said hanger, brackets mounted upon the block, a shaft journaled therein, an internal gear mounted on said shaft, a motor secured to the block, a pinion mounted on the shaft of said motor engaging the internal gear, a pulley also mounted on said shaft, a bracket upon the lower arm of the hanger, the edges of said bracket being dovetailed, a sliding bearing dove-tailed to the bracket, means for adjusting said bearing, a shaft journaled in said bearing, a pulley mountedon said shaft, a band saw passing over the pulleys and between the body of the vertical portion of the hanger and the flange thereon, a rack secured to one edge of the table, brackets secured to the block, one of said brackets having an eccentric disk mounted therein, a lever formed with said eccentric disk, a shaft journaled in a number of said brackets passing through the eccentric disk, a gear and a pinion mounted on said shaft, the pinion meshing with the rack, another shaft journaled in a number of said brackets, a pinion mounted thereon engaging the last named gear, another gear mounted on said shaft, a worm gear mounted on the shaft on which the pulley is mounted meshing with the last named gear, a stop slidably secured to the rack with which the lever is adapted to contact for disengaging the pinion from the rack, attaching members secured to the under side of the table, fastening members having teeth formed on their upper surfaces secured to the table, adjusting members mounted on said fastening members, an eccentric lever mounted in each of said adjusting members for tightening the same upon the fastening members, a gage consisting of a body portion having parallel grooves formed therein, a depending rod, the lower end of which is bent at right angles, and a screw threaded in said portion, for the purpose set forth.

In testimony whereof, I have hereunto aflixed my signature in the presence of two subscribing witnesses.

SAMUEL N. KRAWCHENKO.

Witnesses:

LAWRENCE J. BRoMAN, JOHN MCLAUGHLIN. 

